Telephone-magnet.



UNIT in .srarns PATENT ernten.

`RON E. HARRISON, OF N EW YORK, N. Y., AND CRQWELL M. HASLETT, OF JERSEY CTY, NEW JERSEY.

Specieation of Letters latena Eatented Feb. 26, 1907.

Application tiled September 9,1905. Sei-inl No. 277,668.

To a/ZZ whom t many cm2/ecrit:

Be it known that we, Annex E. l anreisen, a resident of the city of New York, borough of Manhattan, in the county and State ol' New York, and CnownLL M. HAsLn'r'r, a resident of Jersey C ity, in the county ol'lludson and State of New Jersey, both citizens ol the United States, have invented a new and lm.- roved Telephone-Magnet, ot which the .folowing is a full, clear, and description.

Our inventionL relates to magnets, and more particularly to telephone-magnets in which it is desirable to increase to a maximum-the number of lines ot magnetic ilux confined within a given area.

To this end our invention comprises the Yfollowing objects: first, to confine the eilect of a plurality ot magnetic poles upon one or more pole-pieces; second, to give the polepieces such conformity as will enable the windings to be placed directly upon them rather than upon the magnets proper; third, to so shape the pole-pieces to accommodate large number of turns oi the wire and also to decrease the less of eil'eciive magnetic lines; iourth, te increase the general efiiciency of the magnets, and, i'itth, to pro-- vide a more direct. path tor the magnetic lines of force and also to concentratev their effect within a comparatively small area.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters et reference indicate correspondingr parts in both iig res.

Figure 1 is a perspective view of the telephone-magnet complete, the windings being removed, as indicated by dotted lines, and Fig. 2 is an inverted plan view of the complete magnet, shouing how the pole-pieces are mounted upon the magnetic members and thus energized.

A pair 01"' permanent steel magnets 3 4 ol arcuate shape are surmounted by two semicircular permanent magnetic members 5 6, and over these are two other semicircular steel magnets 7 8. All oi the like poles are disposed adjacent to each other, and the separate magnetic members are connected together by means of screws 9. A pair otl detachable pole-pieces 10 l] are bent slightly, so that their tips 10a 11 are Vertical when the magnetic members are horizontal, the polepiec'es 10 11 being inclined obliquelly, as indicated in Fig. 1.' The pole-pieces terminate in pedestals i2 13 in gral therewith, these pedesials being secured to the magnets if', and e by means ol` screws 14 15, which are adapted to secure the entire construction within a suitable Mounted upon the pole-pieces 10 ll are spool ends 1G, 17, 18, and if) ol' elliptical form, made, preferably, of liber, and mounted rigidly over the -spool ends le; 1li are brass washers 2() 21. Both the le 's washers and the spool ends are secured 'idly upon the pole-pieces l0 11 and form angto the general direction of extension el tl` pole-pieces. By this arrangement the spool ends and washers are disposed' in planes parallel to those ol' the permanent maeets, notwithstanding the Obliquity of the poil pieces.

ln tl.Y construction shown all of the north-- seeking poles of the permanent steel magnets are disposed toward the lett, according to the view shown in lig. 2, and all of the southseeking poles are disposed toward the right in said ligure. rl`he pole-pieces 10 11 are thus ot opposite polarity, and the tips 10 1lLL of these pole-pieces are adapted to throw oil a comparatively large number ol lines of force. The windings are indicated by dotted lines at 22, but are removed tor the sake ol' clearness.

lt will be noted that the pole-pieces 1() 1l extend Ytrom a plane passing equatorially through the permanent magnets 3 4 to a peint disposed a considerable distance from this plane. ln other words, the length ofthe pole-pieces 10 11 is increased, because ci the fact that these prole-pieces extend practically to the bottom of the composite ring iormcd by the several pernlanent magnets. 1t will be noted, further, that owing te the Obliquity ot the pole-pieces 1() 11 the length ot these pole-pieces is still further increased. The result is that a comparatively large amount ot wire can be wound upon these pole-pieces intermediate of the spool ends 16 18 and 17 1e.

This magnet is o1 peculiar service in connection with receivers used in wireless telegraphy and related arts, in which it is desirable to increase to the greatest extent the lirios of l'orce proceeding from the pole-pieces.'

ICO

` nected therewith, and spool ends mounted j and metallic Washers secured to the tips of parallel With each' other7 and spool ends said pole-pieces over said spool ends` l mounted upon the pole-pieces and disposed 9. A telephone-magnet, corn rising a plul in planes parallel to those of the magnetic i5 rality of magnetic members, po e-pieces conk l members. Y

In testimony whereof We have signed our upon said pole-pieces and inclined relatively 2 naines to this spooiiication in the nresence to the general length thereof. of two subscribing Witnesses.

1U. Atelephone-niagnet, coinprisinga plu- AAROLl E. HARRISON. rality of magnetic members, pole-pieces eon- CROl/VELL M. HASLETT. nected therewith, the Said pole-pieces haw@ llVitnesses: ing their main or body portions inclined WALToN HARRISON, toward each other and their tips extending EVERARD B. MARSHALL, 

